dodeca = gr.mesh('dodecahedron', {
    {    1.,             1.,              1.},
    {    1.,             1.,              -1.},
    {    1.,             -1.,             1.},
    {    1.,             -1.,             -1.},
    {   -1.,             1.,              1.},
    {   -1.,             1.,              -1.},
    {   -1.,             -1.,             1.},
    {   -1.,             -1.,             -1.},
    {    0.618034,        1.618034,        0.},
    {   -0.618034,        1.618034,        0.},
    {    0.618034,       -1.618034,        0.},
    {   -0.618034,       -1.618034,        0.},
    {    1.618034,        0.,              0.618034},
    {    1.618034,        0.,             -0.618034},
    {   -1.618034,        0.,              0.618034},
    {   -1.618034,        0.,             -0.618034},
    {    0.,             0.618034,         1.618034},
    {    0.,             -0.618034,        1.618034},
    {    0.,             0.618034,        -1.618034},
    {    0.,             -0.618034,       -1.618034}
    }, {
    {   1,       8,       0,       12,      13,  },
    {   4,       9,       5,       15,      14,  },
    {   2,       10,      3,       13,      12,  },
    {   7,       11,      6,       14,      15,  },
    {   2,       12,      0,       16,      17,  },
    {   1,       13,      3,       19,      18,  },
    {   4,       14,      6,       17,      16,  },
    {   7,       15,      5,       18,      19,  },
    {   4,       16,      0,        8,       9,  },
    {   2,       17,      6,       11,      10,  },
    {   1,       18,      5,        9,       8,  },
    {   7,       19,      3,       10,      11,  }
})
